CVE-2022-25236: Debian Linux

Critical severity, CVSS 9.8. EPSS: 34.2% chance of exploitation in the next 30 days.

xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs.

Affected products

  • Debian Debian Linux: version 10.0 only; version 11.0 only
  • Libexpat Project Libexpat: before 2.4.5 (fixed in 2.4.5)
  • Oracle HTTP Server: version 12.2.1.3.0 only; version 12.2.1.4.0 only
  • Oracle ZFS Storage Appliance Kit: version 8.8 only
  • Siemens Sinema Remote Connect Server: before 3.1 (fixed in 3.1)

Published 2022-02-16. Last modified 2026-06-17.